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參數(shù)資料
| 型號： | S-8241ABXMC-GBX-T2 |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數(shù)： | 8/32頁 |
| 文件大?。?/td> | 1009K |
| 代理商： | S-8241ABXMC-GBX-T2 |
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BATTERY PROTECTION IC FOR 1-CELL PACK
S-8241 Series
Rev.4.1_01
Seiko Instruments Inc.
16
Abnormal Charge Current Detection
If the VM pin voltage drops below the charger detection voltage (VCHA) during charging under the normal
condition and it continues for the overcharge detection delay time (tCU) or longer, the S-8241 turns the
charging control FET off and stops charging. This action is called abnormal charge current detection.
Abnormal charge current detection works when the discharging control FET is on (DO pin voltage is “H”)
and the VM pin voltage drops below the charger detection voltage (VCHA). When an abnormal charge
current flows into a battery in the overdischarge condition, the S-8241 consequently turns the charging
control FET off and stops charging after the battery voltage becomes the overdischarge detection voltage
or higher (DO pin voltage becomes “H”) and the overcharge detection delay time (tCU) elapses.
Abnormal charge current detection is released when the voltage difference between VM pin and VSS pin
becomes lower than the charger detection voltage (VCHA) by separating the charger.
Since the 0 V battery charging function has higher priority than the abnormal charge current detection
function, abnormal charge current may not be detected by the product with the 0 V battery charging
function while the battery voltage is low.
Delay Circuits
The following detection delay times are generated by dividing the approximate 2 kHz clock with a counter.
[Example] Overcharge detection delay time (= abnormal charge current detection delay time): 1.0s
Overdischarge detection delay time:
125 ms
Overcurrent 1 detection delay time:
8 ms
Overcurrent 2 detection delay time:
2 ms
Caution 1. After having detected an overcurrent (overcurrent 1, overcurrent 2, short-circuiting), the state is
held for the overdischarge detection delay time or longer without releasing the load, the condition
changes to the power-down condition when the battery voltage drops below the overdischarge
detection voltage. If the battery voltage drops below the overdischarge detection voltage due to
overcurrent, the discharging control FET is turned off when the overcurrent is detected. If the
battery voltage recovers slowly and if the battery voltage after the overdischarge detection delay
time is equal to or lower than the overdischarge detection voltage, the S-8241 changes to the
power-down condition.
DO pin
VM pin
VDD
Time
VIOV1
VSS
VIOV2
Overcurrent 2 detection delay time (tIOV2)
Figure 5
2. Counting for the overcurrent 2 detection delay time starts when the overcurrent 1 is detected.
Having detected the overcurrent 1, if the overcurrent 2 is detected after the overcurrent 2 detection
delay time, the S-8241 turns the discharging control FET off as shown in the figure 5. In this case,
the overcurrent 2 detection delay time may seem to be longer or overcurrent 1 detection delay time
may seem to be shorter than expected.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S-8241ABXMC-GBXT2G | 功能描述:電池管理 Lithium-Ion battery protection (1 cell) RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| S-8241ABXPN-KBXTFG | 制造商:Seiko Instruments Inc (SII) 功能描述:BATTERY PROT LI-ION/LI-POL 4.35V 5PIN SON(A) - Tape and Reel |
| S-8241ABYMC-GBYT2G | 功能描述:電池管理 Lithium-Ion battery protection (1 cell) RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| S-8241ABZPG-KBZTFG | 功能描述:電池管理 LITHIUM-ION BATTERY PROTECTION 1 CELL RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| S-8241ABZPN-KBZTFG | 制造商:Seiko Instruments Inc (SII) 功能描述:BATTERY PROT LI-ION/LI-POL 4.275V 5PIN SON(A) - Tape and Reel |
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